Transversospinales

The transversospinales are a group of muscles of the human back. Their combined action is rotation and extension of the vertebral column. These muscles are small and have a poor mechanical advantage for contributing to motion. They include: the three semispinalis muscles, the multifidus muscle, and the rotatores muscles.

Location
The three semispinalis muscles, span 4-6 vertebral segments:
 * semispinalis thoracis
 * semispinalis cervicis
 * semispinalis capitis

The multifidus muscle, and spans 2-4 vertebral segments

The rotatores muscles, lie beneath the multifidus, and spans 1-2 vertebral segments
 * rotatores cervicis
 * rotatores thoracis
 * rotatores lumborum